- Author
-
Aarre, T.
- Title
- Influence of Measurement Technique on the Air-Void Structure of Hardened Concrete. Discussion by Ken Snyder.
- Coporate
- National Institute of Standards and Technology, Gaithersburg, MD
- Journal
-
ACI Materials Journal,
Vol. 93,
512-514,
1996
- Keywords
-
concretes
|
air void system
|
air void spacing
|
building technology
- Abstract
- The author proposes, and successfully demonstrates, that the results for air content and specific surface area (SSA) from an ASTM C 457 linear traverse performed on a thin section can differ from those performed on a polished plane section. The difference between thin section and plane surface air contents was quantified using a probability theory approach, and semi-quantiattive arguments were given to explain the difference for SSA results. However, the tabulated data suggest further study is needed. The discussion advances the author's work by addressing a minor error in the calculation, and by proposing an analytical approach for estimating the influence of measurement technique on the measured SSA value.